MAX1721X_REG_SER_HEX
ret = regmap_read(info->regmap, MAX1721X_REG_SER_HEX, ®);
if (regmap_read(info->regmap, MAX1721X_REG_SER_HEX, &val[0]))
if (regmap_read(info->regmap, MAX1721X_REG_SER_HEX + 1, &val[1]))
if (regmap_read(info->regmap, MAX1721X_REG_SER_HEX + 2, &val[2]))